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JP2014212445

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DESCRIPTION JP2014212445
Abstract: PROBLEM TO BE SOLVED: To provide a sound output device whose size is reduced and
portability is improved. A plate-shaped first speaker unit 3 is angularly displaceably connected to
one side portion of a main body unit 2, and the plate-shaped second speaker unit 4 can be
angularly displaced on the other side portion of the main body unit 2. The first and second
speaker units 3 and 4 are provided with speakers 8 and 9, respectively. The first and second
speaker parts 3 and 4 are superimposed on the main body part 2 by being connected to one side
and the other side of the main body 2 so as to be displaceable by the first and second speaker
parts 3 and 4. Miniaturize as folded. [Selected figure] Figure 1
Sound output device
[0001]
The present invention relates to an audio output device capable of outputting an audio signal
received wirelessly or by wire from a sound source device such as a teleconference system and a
portable terminal device.
[0002]
In the prior art, a flat plate-like main body incorporating a power switch, a volume, a power
amplifier, an input terminal, a battery, etc., and first and second loudspeaker parts connected to
the main body by a pipe and incorporating a flat speaker unit An acoustic output device has been
proposed (see, for example, Patent Documents 1 and 2).
[0003]
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1
Patent Document 1: Japanese Patent Application Laid-Open Publication No. 2003-32278
[0004]
In the above-mentioned prior art, the first and second speaker parts can be displaced from the
upright state with respect to the main body part to the inclined state so as to form a plane with
the main body part.
Then, by forming the first and second speaker portions and the main body portion into a single
plate, it is possible to miniaturize the plate-like form so that it can be accommodated in a bag or
the like.
However, higher portability is now required by further downsizing and thinning.
[0005]
An object of the present invention is to provide an acoustic output device which is miniaturized
and has improved portability.
[0006]
According to the present invention, there is provided a plate-like main body including an
operation unit for inputting a command related to reproduction of an acoustic signal and a signal
processing unit for outputting an acoustic signal in response to an operation of the operation
unit; A first speaker unit for reproducing an acoustic signal output from the control unit, the first
speaker unit having a plate shape connected to one side of the main unit so as to be angularly
displaceable, and the signal processing unit A second speaker for reproducing an acoustic signal,
the second speaker including a plate-like second speaker connected to the other side of the main
body so as to be angularly displaceable, the main body, and the first speaker And the second
speaker unit may be folded so as to overlap with each other.
[0007]
According to the present invention, since the first and second speaker parts are angularly
displacingly connected on one side and the other side of the main body, the first and second
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speakers are not used when not reproducing the acoustic signal. It is possible to reduce the size
significantly as compared with the state in which the first and second speaker parts are expanded
relative to the main body part in a state where the parts are folded so as to overlap with the main
body part.
This makes it possible to miniaturize the sound output device, for example, in a pocket of clothes,
etc., and can improve portability.
[0008]
It is a perspective view which shows the unfolded state of the sound output apparatus 1 of one
Embodiment of this invention.
It is a perspective view which shows the use condition which the sound output apparatus 1
shown in FIG. 1 was folded up.
It is an exploded perspective view of a sound output device. FIG. 2 is a plan view of the sound
output device 1 in a folded state. It is a bottom view of sound output device 1 in the state where
it was folded up. FIG. 3 is a left side view of the sound output device 1 in a folded state. FIG. 2 is a
right side view of the sound output device 1 in a folded state. It is a front view of the sound
output device 1 in the expanded state. It is a top view of sound output device 1 of a developed
state. It is a perspective view which shows the other use condition of the sound output apparatus
1. FIG.
[0009]
FIG. 1 is a perspective view showing a developed state of use of a sound output apparatus 1
according to an embodiment of the present invention, and FIG. 2 is a perspective view showing a
state in which the sound output apparatus 1 shown in FIG. FIG. 3 is an exploded perspective view
of the sound output device 1. The sound output device 1 of the present embodiment includes a
plate-like main body 2, a plate-like first speaker 3, and a plate-like second speaker 4. Note that,
as shown in FIG. 2, the length of the sound output device 1 is, for example, 45 mm or more and
80 mm or less, and the length of the short side when the surface provided with the operation
unit 5 is viewed in plan However, it is 15 mm or more and 35 mm or less, and the length of the
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long side is set to 100 mm or more and 150 mm or less.
[0010]
The main body unit 2 includes an operation unit 5 for inputting a command related to
reproduction of an acoustic signal, and a signal processing unit 6 for outputting an acoustic
signal in response to an operation of the operation unit 5. The main body 2 is provided with a
third speaker 14 for reproducing an acoustic signal. The signal processing unit 6 is realized by a
central processing unit (abbreviated as CPU).
[0011]
The first speaker unit 3 includes a first speaker 8 for reproducing the acoustic signal output from
the signal processing unit 6. The first speaker unit 3 is connected to one side of the main unit 2
so as to be angularly displaceable around a first axis L1. The first speaker unit 3 has, for
example, a length in the vertical direction of 45 mm to 80 mm, and a short side length of 5 mm
to 12 mm when the surface provided with the operation unit 5 is viewed in plan. The length of
the long side is set to 100 mm or more and 150 mm or less.
[0012]
The second speaker unit 4 includes a second speaker 9 for reproducing the acoustic signal
output from the signal processing unit 6. The second speaker unit 4 is connected to the other
side of the main unit 2 so as to be angularly displaceable about the second axis L2. The second
speaker unit 4 has, for example, a length in the vertical direction of 45 mm to 80 mm, and a
short side length of 5 mm to 12 mm when the surface provided with the operation unit 5 is
viewed in plan. The length of the long side is set to 100 mm or more and 150 mm or less.
[0013]
The main body 2 includes a front cover 10, a back cover 11, an operation unit 5, a circuit board
unit 12, a speaker frame 13, a third speaker 14, and a battery 15. The circuit board unit 12, the
speaker frame 13, the third speaker 14, and the battery 15 are accommodated in an internal
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space between the front cover body 10 and the rear cover body 11. The circuit board unit 12 is
disposed in the upper region of the internal space, and the speaker frame 13, the third speaker
14 and the battery 15 are disposed in the lower region of the internal space. The battery 15 is
realized by, for example, a lithium ion battery, and a battery that can be charged and used
repeatedly is employed.
[0014]
The operation unit 5 includes a plurality of switching elements SW1 to SW4 mounted on one
side of the wiring board 17 of the circuit board unit 12, and a plurality of plungers mounted on
the plungers of the switching elements SW1 to SW4 from the outside of the rear cover body 11.
And operation buttons B1 to B4. Each terminal of each of the switching elements SW1 to SW4 is
connected to the signal processing unit 6, and a signal processing unit 6 performs signal
processing on a signal according to a change in switching mode of each of the switching
elements SW1 to SW4. The signal processing unit 6 also functions as a communication unit, and
can communicate with an external device in accordance with communication standards such as
Bluetooth (registered trademark) and Wi-Fi (registered trademark), for example, to transmit and
receive acoustic signals.
[0015]
When the operation button B1 is pressed, the plunger portion of the switching element SW1 to
which the operation button B1 is attached is displaced, and the switching mode is changed. Then,
when the switching mode of the switching element SW1 changes, a signal corresponding to the
change is generated. Furthermore, the signal can be input to the signal processing unit 6
mounted on the wiring board 17 to increase the volume.
[0016]
When the operation button B2 is pressed, the plunger portion of the switching element SW2 to
which the operation button B2 is attached is displaced, and the switching mode is changed. Then,
when the switching mode of the switching element SW2 changes, a signal corresponding to the
change is generated. Furthermore, the signal can be input to the signal processing unit 6 to
reduce the volume.
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[0017]
When the operation button B3 is further depressed, the plunger portion of the switching element
SW3 to which the operation button B3 is attached is displaced, and the switching mode is
changed. Then, when the switching mode of the switching element SW3 changes, a signal
corresponding to the change is generated. Further, the signal can be input to the signal
processing unit 6 to activate the telephone communication function, output a call signal, and
make a call.
[0018]
When the operation button B4 is further pressed, the plunger portion of the switching element
SW4 to which the operation button B4 is attached is displaced, and the switching mode is
changed. Then, when the switching mode of the switching element SW4 changes, a signal
corresponding to the change is generated. Furthermore, the signal can be input to the signal
processing unit 6 to switch on / off of the power supply of the circuit board unit 12.
[0019]
A sound collecting hole 20 is formed in the back cover 11, and a microphone M is installed at a
portion where the sound collecting hole 20 is formed. The sound collecting hole 20 is formed in
the back cover 11 which is a part of the main body 2, but the sound collecting hole 20 is
provided anywhere in the main body 2 as long as it can easily pass external sounds. Also good.
The microphone M can convert the sound passing through the sound collection hole 20 into an
electrical signal. Then, the microphone M converts the sound into an electric signal, and
transmits the electric signal by the sound of the circuit board unit 12. Furthermore, the electric
signal by the sound transmitted to the circuit board unit 12 is transmitted to the external device,
and the sound is reproduced from the external device. A sound collecting portion is configured
including a portion where the sound collecting hole 20 of the back cover body 11 is formed and
the microphone M.
[0020]
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The back cover 11 is also provided with an indicator lamp 21 that lights up when power is
supplied and is turned off when not supplied to display on / off of the power. In addition, the
indicator lamp 21 emits blue light when the battery state of the battery 15 is good when the
power supply power is on, and emits red light when the battery state of the battery 15 is
deteriorated. The indicator lamp 21 may be realized by, for example, a light emitting diode
(abbreviated as LED).
[0021]
The first speaker unit 3 includes a front cover 23, a back cover 24, a first speaker 8, and a
pressing frame 25. The front cover body 23 is connected to a rectangular plate-like portion 27 in
which a large number of through holes 26 are formed in a central region thereof, and one end of
the plate-like portion 27 in the longitudinal direction. And a piece 28. The through hole 26 is
provided to facilitate the sound generated by the exciter 30 from the inside of the first speaker
portion 3 to the outside.
[0022]
The rear cover body 24 is connected to a rectangular plate-like portion 36 in which a large
number of through holes 35 are formed in the central region, and to one end of the plate-like
portion 36 in the longitudinal direction. And 37. Here, the through holes 26 and the through
holes 35 are formed on both sides in the first speaker portion 3 with the exciter 30 interposed
therebetween. As a result, the sound generated by the exciter 30 can easily travel from the
through hole 26 or the through hole 35 toward the outside.
[0023]
The first speaker 8 includes a plurality (two in the present embodiment) of exciters 30, a film 31,
two frame members 32 for holding the peripheral portion of the film 31 from both sides in the
thickness direction, and a resin layer (not shown) , A plurality of conductors 34, and a load
member (not shown). Each exciter 30 and the load member are formed on the film 31, and the
inner region of each frame member 32 is covered with the resin layer in a state where each
exciter 30 and the load member are connected by the respective conducting wires 34. And
constitute a vibrating body.
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[0024]
The peripheral edge portion of the film 31 is held by the frame members 32 in a state in which
tension is applied in the surface direction. The film 31 has a thickness of 10 to 200 μm and is
made of, for example, a resin such as polyethylene, polyimide, polypropylene, polystyrene or
processed paper. The main surface on the film 31 side of the exciter 30 and the film 31 are
bonded via a double-sided tape or the like. The film 31 itself may be replaced with a sponge, and
the exciter 30 may be bonded to the sponge with a double-sided tape. By making the sponge
more flexible than the film 31, the exciter 30 can be easily deformed, and the sound can be
increased.
[0025]
The peripheral portion of the vibrating body is screwed and fixed to the rear cover body 24 by
the presser frame 25. The voltage of the acoustic signal is applied to each of the wires 34 from
the signal processing unit 6, whereby the exciter 30 vibrates, and furthermore, the vibrating
body vibrates to emit sound. That is, in the first speaker unit 3, the exciter 30 capable of
converting an electrical signal into a sound is built in, and a sound can be generated according to
the electrical signal from the main unit 2. Since the exciter 30 has low directivity of sound and
generates sound in all directions, the sound advances from both the front and back of the first
speaker unit 3 to the outside.
[0026]
Similar to the first speaker unit 3, the second speaker unit 4 includes a front cover 43, a back
cover 44, a second speaker 9, and a pressing frame 45. The front cover body 43 is connected to
a rectangular plate-like portion 47 in which a large number of through holes 46 are formed in
the central region, and to one end of the plate-like portion 47 in the longitudinal direction. And
48.
[0027]
The rear cover body 44 has a rectangular plate-like portion 50 in which a large number of
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through holes 49 are formed in a central region, and a hinge piece 51 which is continuous with
one end of the plate-like portion 50 in the longitudinal direction. And. The second speaker 9 is
configured in the same manner as the first speaker 8. Like the first speaker unit 3, in the second
speaker unit 4, the second speaker unit 4 includes an exciter 30 capable of converting an
electrical signal into a sound, and the second speaker unit 4 includes an exciter 30 for converting
the electrical signal from the main unit 2. In response, sound can be generated. Since the exciter
30 has low directivity of sound and generates sound in all directions, the sound advances from
both the front and back of the second speaker unit 4 to the outside.
[0028]
FIG. 4 is a plan view of the acoustic output device in a folded state, and FIG. 5 is a bottom view of
the acoustic output device in a folded state. With reference also to FIGS. 1 to 3, a configuration in
which the first and second speaker parts 3 and 4 can be angularly displaced with respect to the
main body part 2 will be described. The back cover portion 11 of the main body portion 2 has a
substantially rectangular flat plate-like base 53, a top plate 54 which is bent at a right angle from
one long side end of the base 53, and the other long side of the base 53 A bottom plate portion
55 bent at right angles from the side end and continued, two disk-shaped top plate side end
plates 56 and 57 continued along the same plane at both longitudinal end portions of the top
plate portion 53, and a bottom plate 55 Two disc-like bottom plate side end plates 58 and 59
connected along the same plane at both ends in the longitudinal direction of each, and the
respective top plate side end plates 56 and 57 and the respective bottom plate side end plates 58
and 59 close to each other And hinge pieces 60, 61; 62, 63 which form a part of the cylindrical
body. A sound emission opening 64 is formed in the base 53 such that the third speaker 14 is
exposed.
[0029]
The front cover body 10 has a substantially rectangular flat base 65, and two hinge pieces 66
and 67 which are continuous with one end of the base 65 in the longitudinal direction and at
both ends in the short side direction and form a part of a cylinder. The other end of the base
portion 65 in the longitudinal direction and the both ends in the direction of the short side are
connected to each other, and have two hinge pieces 68 and 69 which form a part of a cylindrical
body. A sound emission opening 70 is formed in the base 65 so that the cone of the third speaker
14 is exposed.
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[0030]
The middle hinge piece 28 of the front cover 23 of the first speaker unit 3 and the middle hinge
piece 37 of the rear cover 36 are fitted between the hinge pieces 66 and 67. In addition, the
middle hinge piece 48 and the back cover body 44 of the front cover body 47 of the second
speaker unit 4 are fitted between the hinge pieces 68 and 69.
[0031]
Both ends in the direction of the first axis L1 of each of the intermediate hinge pieces 28 and 37
constitute a narrow cylindrical hinge pin portion, and the hinge pin portion includes a plurality of
front cover bodies 10 and back cover bodies 11 of the main body 2. By being joined by a screw
or the like, the hinge pieces 60, 66; 62, 67 are held from both sides by the hinge pieces and held
so as to be angularly displaceable around the first axis L1.
[0032]
The hinge pieces 61 and 63 of the back cover 11 of the main body 2 are fitted to the hinge
pieces 68 and 69, respectively, and these are attached from the outside by the hinge pieces 51
provided on the back cover 44 of the second speaker 4 It is covered and held so as to be
angularly displaceable about the second axis L2.
[0033]
FIG. 6 is a left side view of the sound output apparatus 1 in the folded state, and FIG. 7 is a right
side view of the sound output apparatus 1 in the folded state.
An input jack 73 to which an output plug of an external device can be connected is provided as a
connection portion to the above-mentioned hinge piece 51 in the rear cover body 44 of the
second speaker unit 4 and a power supply to which an output plug of an AC power adapter can
be connected An input terminal 74 is provided.
[0034]
FIG. 8 is a front view of the sound output device 1 in the unfolded state, and FIG. 9 is a plan view
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of the sound output device 1 in the unfolded state.
In the state in which the first and second speaker parts 3 and 4 are developed and opened with
respect to the main body part 2, they have directivity. For example, the first speaker portion 3
can be angularly displaced with respect to the main body portion 2 in the range of an angle θ1
of 0 ° or more and 130 ° or less around the first axis L1. In addition, the second speaker unit 4
can also be angularly displaced with respect to the main body unit 2 in the range of 0 ° or more
and 130 ° or less around the second axis L2.
[0035]
As described above, since the first and second speaker units 3 and 4 are configured to be
angularly displaceable with respect to the main unit 2, as shown in the perspective view of FIG.
10, the side end 3a of the first speaker unit 3 And the side end 4a of the second speaker unit 4
are loosely fitted and assembled so that the outer appearance is like a so-called triangular
cylinder, and the sound is omnidirectionally in a state where there is almost no directivity. It can
radiate. Moreover, since the microphone M is built in, the sound output device 1 can be used as a
speaker phone having a communication function in a teleconference system. That is, as shown in
FIG. 10, when the acoustic power device 1 planarly views the operation unit 5, it can be formed
in a triangular shape in plan view. Then, by generating sound from both main surfaces of the first
speaker and the second speaker units 3 and 4, it is possible to easily transmit the sound to
people in all directions such as a conference room, not in a specific direction.
[0036]
As described above, according to the present embodiment, since the first and second speaker
units 3 and 4 are angularly displacingly connected at one side and the other side of the main
body 2, a non-use not reproducing the acoustic signal is performed. Sometimes, the first and
second speaker units 3 and 4 can be folded relative to the main unit 2. As a result, compared to
the state in which the first and second speaker units 3 and 4 are expanded relative to the main
unit 2, the occupied volume can be made smaller by being significantly smaller. By this, the
sound output device 1 can be accommodated in a pocket or the like of clothes, and portability
can be improved.
[0037]
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Further, since the third speaker 14 for reproducing the sound signal is provided in the main body
2, the first and second speakers 3 and 4 mainly output the mid-high range, and the third speaker
14 mainly outputs the bass The tone ranges of (1) to (3) can be output to make the tone ranges
carried by the first to third speakers 3, 4, 14 different. By this, compared with the case where
only the first and second speakers 3 and 4 are provided, acoustic characteristics such as sound
quality can be improved.
[0038]
Further, the main unit 2 is provided with a signal processing unit 6 constituting a communication
unit for wirelessly communicating with an external device such as a mobile phone, and an
acoustic signal can be input through the signal processing unit 6. And, by making the sound
output device 1 wireless, there is no need to connect the external device and the sound output
device 1 by the signal line, there is less restriction on the arrangement with respect to the
external device, and the degree of freedom in arrangement is increased. The convenience in use
can be improved.
[0039]
Further, the main unit 2 is provided with a sound collecting unit configured to include a
microphone M and the like connected to the signal processing unit 6 as a communication unit,
and the signal processing unit 6 is configured to receive an acoustic signal input from the sound
collecting unit. It can be sent to an external device via Therefore, since the sound output device 1
can not only reproduce and output the sound signal received by the signal processing unit 6 but
also transmit the sound signal collected by the sound collection unit, the portable terminal which
is an external device The audio signal (for example, classical music) input from the device (for
example, smart phone) can be used not only for reproducing and outputting the audio signal but
also for the teleconference system, and a versatile audio output device can be realized. . In
addition, the sound output device 1 can act to make the human color visually and smallly
recognize by unifying the whole color into black rather than unifying the whole color into white. .
[0040]
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Further, the main body 2 is provided with an input jack 73 which is a connecting portion for
connecting with an external device in a wired manner, and an acoustic signal can be inputted
through the input jack 73. As a result, even an external device such as a portable CD player that
does not have a wireless communication function can capture and reproduce an acoustic signal
from the external device through the connection unit. A versatile audio output device can be
realized.
[0041]
In addition, since the first and second speakers 8 and 9 are electric field speakers, the thickness
of the first speaker unit 3 and the second speaker unit 4 can be reduced to reduce the overall
thickness and further improve the portability. be able to.
[0042]
In addition, by using the third speaker 14 as an electromagnetic speaker, it is possible to output
and reproduce an acoustic signal in a range different from the range loaded by the first and
second speakers 8 and 9, for example, a low range, so that the sound quality can be improved. It
can be improved.
That is, by using both the electric field speaker and the electromagnetic speaker, it is possible to
expand the frequency range in which the sound is generated, and it is possible to realize a better
quality sound.
[0043]
DESCRIPTION OF SYMBOLS 1 sound output apparatus 2 main-body part 3 1st speaker part 4
2nd speaker part 5 operation part 6 signal processing part 8 1st speaker 9 2nd speaker 14 3rd
speaker 15 battery L1, L2 axial line SW1-SW4 switching element
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